The .NET component and ActiveX component can be bundled together and are called the “OPC Data Client” components. Both components share a common API and key features.
Key Features
Specifications: OPC Data Access 1.0, 2.0 and 3.0, OPC Unified Architecture (under development).
Tested for compliance with standards and interoperability.
Supports operating systems from Windows 2000 to Windows Vista, Windows 7 and Windows Server 2008.
Multi-threaded, non-blocking design for high performance.
Internal messaging layer provides isolation between OPC communications and the custom client code, resulting in high resiliency.
Automatically connects to and disconnects from OPC Servers.
Automatically adds, removes and maintains OPC groups and items.
Conserves resources behind-the-scenes by automatically disposing of objects that are not being used.
No artificial limits to number of connections, subscriptions, or tags.
Automatic server status checking, detection of connection problems and server failures, and automatic reconnects.
Maintains client state and reconstructs the internal state of OPC server after reconnection.
Supports all flavors of OPC synchronous and asynchronous reads and writes, subscriptions, browsing, and property access.
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